Advanced Monolithic Systems, Inc.

www.advanced-monolithic.com

Phone (925) 443-0722

Fax (925) 443-0723

Advanced

AMS285-2.5/AMS385-2.5

Monolithic

MICROPOWER VOLTAGE REFERENCE DIODE

Systems

RoHS compliant

FEATURES

APPLICATIONS

• ±20 mV (±0.8%) max. initial tolerance (A grade)

• Battery Powered Systems

• Operating Current 20µA to 20mA

• Instrumentation

• Low Voltage Reference 2.5V

• A/D, D/A Converters

• Max. 0.6Ω Dynamic Impedance (A grade)

• Temperature measurement

• Low Temperature Coefficient

• Current sources

• 1.2V Device and Adjustable Device also available

• Notebook/Personal Computer

AMS285-1.2 and AMS285 series, respectively

• Monitors/ VCR/ TV

AMS385-1.2 and AMS385 series.

• Pagers

GENERAL DESCRIPTION

The AMS285-2.5/AMS385-2.5 are two-terminal micropower band-gap voltage reference diodes. They feature a very low

dynamic impedance and good temperature coefficient, operating over a 20µA to 20mA current range. On-chip trimming is

used to provide tight voltage tolerance. Since the AMS285-2.5/AMS385-2.5 is a band-gap reference, uses only transistors and

resistors, low noise and good long term stability result. Careful design of the AMS285-2.5/AMS385-2.5 has made the device

exceptionally tolerant of capacitive loading, making it easy to use in almost any reference application. The wide dynamic

operating range allows its use with widely varying supplies with excellent regulation. The extremely low power drain of the

AMS285-2.5/AMS385-2.5 makes these reference diodes useful for micropower circuitry. These voltage references can be used

to make portable meters, regulators or general purpose analog circuitry with battery life approaching shelf life. Further more,

the wide operating current allows it to replace older references with a tight tolerance part.

The AMS285-2.5 is operational in the full industrial temperature range of -40

°C to 85°C while AMS385-2.5 is operating over

a 0

°C to 70°C temperature range. The AMS285-2.5/AMS385-2.5 are available in TO-92, SO-8 and SOT-89 packages.

ORDERING INFORMATION:

TOL.

PACKAGE TYPE

OPERATING

TO-92

8 LEAD SOIC

SOT-89

TEMPERATURE RANGE

±

20mV

AMS285-2.5AN

AMS285-2.5AS

AMS285-2.5AL

-40 to 85

° C

±

38mV

AMS285-2.5BN

AMS285-2.5BS

AMS285-2.5BL

-40 to 85

° C

±

75mV

AMS285-2.5CN

AMS285-2.5CS

AMS285-2.5CL

-40 to 85

° C

±

20mV

AMS385-2.5AN

AMS385-2.5AS

AMS385-2.5AL

0 to 70

° C

±

38mV

AMS385-2.5BN

AMS385-2.5BS

AMS385-2.5BL

0 to 70

° C

±

75mV

AMS385-2.5CN

AMS385-2.5CS

AMS385-2.5CL

0 to 70

° C